Never cooked one that small, but the snake method should work fine. Cook to an IT of about 170*-180*, mine usually takes 4 hours, your 5 pounder probably much less. Then wrap, preferably in butcher paper, foil if you must and continue cooking until it probes tender with an IT in the 200*-210* range, again mine usually takes a couple more hours. The IT's are just reference point, cook until it is probe tender. PS: I cook ate about 300*-310* at the cooking grate.
Edit: FYI here is my last one: